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Fencer Intel
critical 9.8

CVE-2015-4643 in the critical feed json

Integer overflow in the ftp_genlist function in ext/ftp/ftp.c in PHP before 5.4.42, 5.5.x before 5.5.26, and 5.6.x before 5.6.10 allows rem…

published 2016-05-16 10 y ago modified 2026-06-17 4 mo ago also EUVD-2015-4662

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
15.4%
EPSS 15.4% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

Integer overflow in the ftp_genlist function in ext/ftp/ftp.c in PHP before 5.4.42, 5.5.x before 5.5.26, and 5.6.x before 5.6.10 allows remote FTP servers to execute arbitrary code via a long reply to a LIST command, leading to a heap-based buffer overflow. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-4022.

Patch / fix

  • php php 5.4.42, 5.5.26, 5.6.10
  • php5 Ubuntu 14.04 LTS 5.5.9+dfsg-1ubuntu4.11

ubuntu advisories UBUNTU-CVE-2015-4643

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • php RHEL 6 5.3.3-46.el6_6
  • php-gd RHEL 6 5.3.3-46.el6_6
  • php-cli RHEL 6 5.3.3-46.el6_6
  • php-dba RHEL 6 5.3.3-46.el6_6
  • php-fpm RHEL 6 5.3.3-46.el6_6
  • php-pdo RHEL 6 5.3.3-46.el6_6
  • php-xml RHEL 6 5.3.3-46.el6_6
  • php-zts RHEL 6 5.3.3-46.el6_6

red hat advisories RHSA-2015:1218RHSA-2015:1186RHSA-2015:1135RHSA-2015:1187RHSA-2015:1219

  • php5 SLE Software Development Kit 12, SLE Module for Web and Scripting 12 5.5.14-30.1
  • php53 SLES 11 SP2-LTSS 5.3.17-47.1

suse advisories SUSE-SU-2016:1638-1SUSE-SU-2015:1253-2SUSE-SU-2015:1253-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-4643 updated cvss 5.1

php: integer overflow in ftp_genlist() resulting in heap overflow (improved fix for CVE-2015-4022)

  • Red Hat Enterprise Linux 5 php, php53
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client Optional (v. 7) php 5.4.16-36.el7_1, php-gd 5.4.16-36.el7_1, php-cli 5.4.16-36.el7_1, php-dba 5.4.16-36.el7_1, php-fpm 5.4.16-36.el7_1, php-pdo 5.4.16-36.el7_1, +18 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) php 5.4.16-36.el7_1, php-gd 5.4.16-36.el7_1, php-cli 5.4.16-36.el7_1, php-dba 5.4.16-36.el7_1, php-fpm 5.4.16-36.el7_1, php-pdo 5.4.16-36.el7_1, +18 more
    fixed: vendor fix RHSA-2015:1135
  • Red Hat Enterprise Linux Desktop Optional (v. 6) php 5.3.3-46.el6_6, php-gd 5.3.3-46.el6_6, php-cli 5.3.3-46.el6_6, php-dba 5.3.3-46.el6_6, php-fpm 5.3.3-46.el6_6, php-pdo 5.3.3-46.el6_6, +20 more Red Hat Enterprise Linux HPC Node (v. 6) php 5.3.3-46.el6_6, php-cli 5.3.3-46.el6_6, php-common 5.3.3-46.el6_6 Red Hat Enterprise Linux HPC Node Optional (v. 6) php 5.3.3-46.el6_6, php-gd 5.3.3-46.el6_6, php-dba 5.3.3-46.el6_6, php-fpm 5.3.3-46.el6_6, php-pdo 5.3.3-46.el6_6, php-xml 5.3.3-46.el6_6, +18 more Red Hat Enterprise Linux Server (v. 6) php 5.3.3-46.el6_6, php-gd 5.3.3-46.el6_6, php-cli 5.3.3-46.el6_6, php-pdo 5.3.3-46.el6_6, php-xml 5.3.3-46.el6_6, php-ldap 5.3.3-46.el6_6, +6 more
    fixed: vendor fix RHSA-2015:1218
  • Red Hat Enterprise Linux Server (v. 7) php 5.4.16-36.el7_1, php 5.4.16-36.ael7b_1, php-gd 5.4.16-36.el7_1, php-cli 5.4.16-36.el7_1, php-pdo 5.4.16-36.el7_1, php-xml 5.4.16-36.el7_1, +22 more
    fixed: vendor fix RHSA-2015:1135
  • Red Hat Enterprise Linux Server Optional (v. 6) php-dba 5.3.3-46.el6_6, php-fpm 5.3.3-46.el6_6, php-zts 5.3.3-46.el6_6, php-imap 5.3.3-46.el6_6, php-intl 5.3.3-46.el6_6, php-snmp 5.3.3-46.el6_6, +8 more
    fixed: vendor fix RHSA-2015:1218
  • Red Hat Enterprise Linux Server Optional (v. 7) php-dba 5.4.16-36.el7_1, php-fpm 5.4.16-36.el7_1, php-intl 5.4.16-36.el7_1, php-snmp 5.4.16-36.el7_1, php-dba 5.4.16-36.ael7b_1, php-fpm 5.4.16-36.ael7b_1, +14 more
    fixed: vendor fix RHSA-2015:1135
  • Red Hat Enterprise Linux Workstation (v. 6) php 5.3.3-46.el6_6, php-gd 5.3.3-46.el6_6, php-cli 5.3.3-46.el6_6, php-pdo 5.3.3-46.el6_6, php-xml 5.3.3-46.el6_6, php-ldap 5.3.3-46.el6_6, +6 more
    fixed: vendor fix RHSA-2015:1218
  • Red Hat Enterprise Linux Workstation (v. 7) php 5.4.16-36.el7_1, php-gd 5.4.16-36.el7_1, php-cli 5.4.16-36.el7_1, php-pdo 5.4.16-36.el7_1, php-xml 5.4.16-36.el7_1, php-ldap 5.4.16-36.el7_1, +8 more
    fixed: vendor fix RHSA-2015:1135
show 3 more
  • Red Hat Enterprise Linux Workstation Optional (v. 6) php-dba 5.3.3-46.el6_6, php-fpm 5.3.3-46.el6_6, php-zts 5.3.3-46.el6_6, php-imap 5.3.3-46.el6_6, php-intl 5.3.3-46.el6_6, php-snmp 5.3.3-46.el6_6, +8 more
    fixed: vendor fix RHSA-2015:1218
  • Red Hat Enterprise Linux Workstation Optional (v. 7) php-dba 5.4.16-36.el7_1, php-fpm 5.4.16-36.el7_1, php-intl 5.4.16-36.el7_1, php-snmp 5.4.16-36.el7_1, php-bcmath 5.4.16-36.el7_1, php-pspell 5.4.16-36.el7_1, +4 more
    fixed: vendor fix RHSA-2015:1135
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) php54-php 5.4.40-3.el6, php55-php 5.5.21-4.el6, rh-php56-php 5.6.5-7.el6, php54-php-gd 5.4.40-3.el6, php55-php-gd 5.5.21-4.el6, php54-php-cli 5.4.40-3.el6, +72 more Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) php54-php 5.4.40-3.el7, php55-php 5.5.21-4.el7, rh-php56-php 5.6.5-7.el7, php54-php-gd 5.4.40-3.el7, php55-php-gd 5.5.21-4.el7, php54-php-cli 5.4.40-3.el7, +66 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.5) php54-php 5.4.40-3.el6, php55-php 5.5.21-4.el6, rh-php56-php 5.6.5-7.el6, php54-php-gd 5.4.40-3.el6, php55-php-gd 5.5.21-4.el6, php54-php-cli 5.4.40-3.el6, +72 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) php54-php 5.4.40-3.el6, php55-php 5.5.21-4.el6, rh-php56-php 5.6.5-7.el6, php54-php-gd 5.4.40-3.el6, php55-php-gd 5.5.21-4.el6, php54-php-cli 5.4.40-3.el6, +72 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1) php54-php 5.4.40-3.el7, php55-php 5.5.21-4.el7, rh-php56-php 5.6.5-7.el7, php54-php-gd 5.4.40-3.el7, php55-php-gd 5.5.21-4.el7, php54-php-cli 5.4.40-3.el7, +66 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) php54-php 5.4.40-3.el6, php55-php 5.5.21-4.el6, rh-php56-php 5.6.5-7.el6, php54-php-gd 5.4.40-3.el6, php55-php-gd 5.5.21-4.el6, php54-php-cli 5.4.40-3.el6, +72 more
    +1 more products
    Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) php54-php 5.4.40-3.el7, php55-php 5.5.21-4.el7, rh-php56-php 5.6.5-7.el7, php54-php-gd 5.4.40-3.el7, php55-php-gd 5.5.21-4.el7, php54-php-cli 5.4.40-3.el7, +66 more
    fixed: vendor fix RHSA-2015:1219

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

15.41% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugs.php.net https://bugs.php.net/bug.php?id=69545 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.